Washington Post. (Washington is throwing its weight around these days. See how they think.)

http://www.washingtonpost.com/

Bloomberg. Often interesting original content. But very slow.

http://www.bloomberg.com/

CNBC Television dominates. Here is the web version.

http://www.cnbc.com/

Corporate finance news

http://www.financialweek.com/

Useful daily collection of stories

http://www.realclearmarkets.com/

The Wall Street Journal.

http://online.wsj.com/

Yahoo Finance is well known and deservedly so.

http://finance.yahoo.com/

FINRA is not as well known as it should be. Wonderful information.

http://www.finra.org/Investors/index.htm

An entertaining stock analyst

http://www.jeffmatthewsisnotmakingthisup.blogspot.com/

Fama and French (Mainstream empirical asset pricing.)

http://www.dimensional.com/famafrench/

John Cochrane (Chicago macro-finance. Exceptionally clear writer.)

http://faculty.chicagobooth.edu/john.cochrane/research/Papers/

Greg Mankiw (Mainstream Keynesian macroeconomist.)

http://gregmankiw.blogspot.com/

Brad DeLong (Strongly partisan Democrat. At times over the top.)  

http://delong.typepad.com/sdj/

Freakonomics (A taste for quirky stuff. Often entertaining.)

http://freakonomics.blogs.nytimes.com/

The Economist Magazine Blog (Higher ratio of news)

http://www.economist.com/blogs/freeexchange/

Financial Times (Euro/British oriented economics blog)

http://blogs.ft.com/wolfforum/

Wilmott (articles and forums from a London IB perspective)

http://www.wilmott.com/

Gelman (Statistics, not finance)

http://www.stat.columbia.edu/~gelman/blog/